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Author Topic: Airband Yagi antenna designs  (Read 84391 times)

Offline borczm

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Re: Airband Yagi antenna designs
« Reply #50 on: November 06, 2017, 03:53:06 PM »
Gents, here's a dumb question:

I understand the feeder element is insulated, but are the directors/reflectors bonded together? or do I need to isolate each one? I can't tell for sure, the images in the pdf seem to indicate the elements are not connected but other Yagi antennas I'm looking at, it would appear director's and reflectors are attached to a conductive boom without insulation?

...and if they are connected together, can they be grounded?

Thanks!!!
Feeder:
ZAU Chicago Center (Sector 74 FARMM Low)
3CK CTAF (Lake In the Hills)

Offline dave

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Re: Airband Yagi antenna designs
« Reply #51 on: November 06, 2017, 04:01:40 PM »
Gents, here's a dumb question:

I understand the feeder element is insulated, but are the directors/reflectors bonded together? or do I need to isolate each one? I can't tell for sure, the images in the pdf seem to indicate the elements are not connected but other Yagi antennas I'm looking at, it would appear director's and reflectors are attached to a conductive boom without insulation?

...and if they are connected together, can they be grounded?

Thanks!!!

It depends on the design but on most Yagis the elements are electrically isolated from the boom. And you definitely don't want to ground the elements under any circumstances.

Dave


Offline hunterantov2021

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Re: Airband Yagi antenna designs
« Reply #52 on: December 21, 2017, 06:37:34 PM »
Greetings friends
Yagi Antenna 118-137



I have built the same antenna but with 4 elements

managing to listen to the airport at 50 miles
the results have been incredible



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Re: Airband Yagi antenna designs
« Reply #52 on: December 21, 2017, 06:37:34 PM »